1243140696 has 80 divisors (see below), whose sum is σ = 3979380240. Its totient is φ = 355181760.

The previous prime is 1243140653. The next prime is 1243140733. The reversal of 1243140696 is 6960413421.

1243140696 is a `hidden beast` number, since 1 + 243 + 1 + 406 + 9 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1243140696.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 132495 + ... + 141566.

It is an arithmetic number, because the mean of its divisors is an integer number (49742253).

Almost surely, 2^1243140696 is an apocalyptic number.

It is an amenable number.

1243140696 is an abundant number, since it is smaller than the sum of its proper divisors (2736239544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243140696 is a wasteful number, since it uses less digits than its factorization.

1243140696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274086 (or 274073 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1243140696 is about 35258.2004078484. The cubic root of 1243140696 is about 1075.2433401894.

The spelling of 1243140696 in words is "one billion, two hundred forty-three million, one hundred forty thousand, six hundred ninety-six".